This uses the suggestion that Mike Mearls mentioned this week that Fighters get 2 themes.
Race High Elf
Class Fighter Level 1
Theme Magic User, Slayer
AC 16 with Shield
Str 16 (+3) Dex 12 (+1) Con 14 (+2)
Int 14 (+2) Wis 14 (+2) Cha 10 (+0)
Space/Reach 5 feet/5 feet
Speed 30 feet
Melee Attack longsword +6 (1d8+5 slashing, miss 3)
Ranged Attack shocking grasp +5 (1d8+2 lightning, miss 2)
Race: High Elf
Free Spirit: You are immune to the charmed condition and to effects that put you to sleep.
Keen Senses: You have Advantage on checks made to listen, search or notice something.
Low-Light Vision: If there is no light within 30 feet of you, you treat shadows in that radius as normal light, and you treat darkness in that radius as shadows.
Weapon and Armor Proficiencies: All
Weapon Focus: You gain a +2 to damage with weapons.
Intimidate +3, Perception +3, Survival +3
Theme: Magic User
Feat: Arcane Dabbler
Benefit: You know 2 Cantrips
Mage Hand and Shocking Grasp are the minor magic you've learned.
Benefit: When you miss with an attack, you still deal damage equal to the ability score modifier of the ability you used to make the attack.